Preparation of high quality spherical powder of TC4 ELI titanium alloy
Using titanium alloy rod TC4 ELI as raw material,spherical TC4 ELI powder was prepared by plasma rotating electrode method(PREP).The effects of current and electrode speed on the particle size distribution and powder properties were investigated.The morphology of the powder was observed using a scanning electron microscope(SEM).The research results show that when the current remained constant at 600 A,the yield of 53～106 μm TC4 ELI powder increases with the increase of electrode speed.At an electrode speed of 44000 r/min,the yield of powder with a particle size of less than 106 μm increases slightly with increasing current.The obtained powder has a loose packing density in the range of 2.59～2.72 g/cm3,a compacted density of 3.0 g/cm3,an oxygen content in the range of 560×10-6～750×10-6 and a fluidity(calculated as 50 g)of 30.6～35.7 s.The powder has high sphericity rate,good sphericity,smooth edges without impurities and a sphericity greater than 90％.
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